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Climate Control Seat System - Diagnostics: Inspection

  1. Driver's side: 

    INSPECT TRACTION CONTROL SWITCH (CLIMATE CONTROL SWITCH FRONT) 

    1. Measure the resistance between the terminals when the switch is operated.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      1 (LV5) - 12 (LVS) Switch ON (LH) Max. COOL to Max. WARM 0 to 5 kΩ

      HINT:

      As the dial is being turned, the resistance changes gradually.

      If the result is not as specified, replace the switch.

    2. Check that the climate control switch indicator illuminates.

      OK: 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Switch Condition Specified Condition
      Battery positive (+) --> Terminal 3 (LIND) Battery negative (-) --> Terminal 6 (E) ON (LH) Illuminates

      If the result is not as specified, replace the switch or bulb.

    3. Check that the climate control switch illuminates.

    OK: 

    MEASUREMENT CONDITION AND SPECIFIED CONDITION

    Measurement Condition Specified Condition
    Battery positive (+) --> Terminal 20 (ILL+) Battery negative (-) --> Terminal 5 (ILL-) Illuminates

    If the result is not as specified, replace the switch or bulb.

    Fig 1: Identifying Traction Control Switch Connector Terminals - Driver Side (Climate Control Switch Front)
    G03001181Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Passenger's side: 

    INSPECT TRACTION CONTROL SWITCH (CLIMATE CONTROL SWITCH FRONT) 

    1. Measure the resistance between the terminals when the switch is operated.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      15 (RV5) - 16 (RVS) Switch ON (RH) Max. COOL to Max. WARM 0 to 5 kΩ

      HINT:

      As the dial is being turned, the resistance changes gradually.

      If the result is not as specified, replace the switch.

    2. Check that the climate control switch indicator illuminates.

      OK: 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Switch Condition Specified Condition
      Battery positive (+) --> Terminal 2 (RIND) Battery negative (-) --> Terminal 6 (E) ON (RH) Illuminates

      If the result is not as specified, replace the switch or bulb.

    3. Check that the climate control switch illuminates.

    OK: 

    MEASUREMENT CONDITION AND SPECIFIED CONDITION

    Measurement Condition Specified Condition
    Battery positive (+) --> Terminal 20 (ILL+) Battery negative (-) --> Terminal 5 (ILL-) Illuminates

    If the result is not as specified, replace the switch or bulb.

    Fig 2: Identifying Traction Control Switch Connector Terminals - Passenger Side (Climate Control Switch Front)
    G03001182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT SEAT CLIMATE CONTROLLER LH (FRONT SEAT CUSHION) 
    1. Measure the resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      3 (TDC+) - 6 (TDC-) Below 1 Ω

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals.

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    1 (TCS) - 2 (TC5) Controller temperature 10°C (50°F) 3.6 to 3.8 kΩ
    1 (TCS) - 2 (TC5) Controller temperature 25°C (77°F) 1.9 to 2.1 kΩ
    1 (TCS) - 2 (TC5) Controller temperature 30°C (86°F) 1.6 to 1.7 kΩ

    HINT:

    As the temperature increases, the resistance decreases.

    If the result is not as specified, replace the controller.

    Fig 3: Identifying Seat Climate Controller LH Connector Terminals (Front Seat Cushion)
    G03001183Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT SEAT CLIMATE CONTROLLER RH (FRONT SEAT CUSHION) 
    1. Measure the resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      3 (TDC+) - 6 (TDC-) Below 1 Ω

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals.

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    1 (TCS) - 2 (TC5) Controller temperature 10°C (50°F) 3.6 to 3.8 kΩ
    1 (TCS) - 2 (TC5) Controller temperature 25°C (77°F) 1.9 to 2.1 kΩ
    1 (TCS) - 2 (TC5) Controller temperature 30°C (86°F) 1.6 to 1.7 kΩ

    HINT:

    As the temperature increases, the resistance decreases.

    If the result is not as specified, replace the controller.

    Fig 4: Identifying Seat Climate Controller RH Connector Terminals (Front Seat Cushion)
    G03001184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT SEAT CLIMATE CONTROLLER LH (FRONT SEATBACK) 
    1. Measure the resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      4 (TDB-) - 5 (TDB+) Below 1 Ω

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals.

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    2 (TBS) - 3 (TB5) Controller temperature 10°C (50°F) 3.6 to 3.8 kΩ
    2 (TBS) - 3 (TB5) Controller temperature 25°C (77°F) 1.9 to 2.1 kΩ
    2 (TBS) - 3 (TB5) Controller temperature 30°C (86°F) 1.6 to 1.7 kΩ

    HINT:

    As the temperature increases, the resistance decreases.

    If the result is not as specified, replace the controller.

    Fig 5: Identifying Seat Climate Controller LH Connector Terminals (Front Seatback)
    G03001185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT SEAT CLIMATE CONTROLLER RH (FRONT SEATBACK) 
    1. Measure the resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      4 (TDB-) - 5 (TDB+) Below 1 Ω

      If the result is not as specified, replace the controller.

      Fig 6: Identifying Seat Climate Controller RH Connector Terminals (Front Seatback)
      G03001186Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the thermistor resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      2 (TBS) - 3 (TB5) Controller temperature 10°C (50°F) 3.6 to 3.8 kΩ
      2 (TBS) - 3 (TB5) Controller temperature 25°C (77°F) 1.9 to 2.1 kΩ
      2 (TBS) - 3 (TB5) Controller temperature 30°C (86°F) 1.6 to 1.7 kΩ

      HINT:

      As the temperature increases, the resistance decreases.

      If the result is not as specified, replace the controller.

    3. INSPECT CLIMATE CONTROL SWITCH LH (REAR) 
      1. Measure the resistance between the terminals when the switch is operated.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        10 (VSL) - 13 (V5L) Switch ON (LH) Max. COOL to Max. WARM 0 to 5 kΩ
        11 (SWL) - 8 (E) ON Below 1 Ω
        11 (SWL) - 8 (E) OFF 10 kΩ or higher

        HINT:

        As the dial is being turned, the resistance changes gradually.

        If the result is not as specified, replace the switch.

      2. Check that the climate control switch indicator illuminates.

        OK: 

        MEASUREMENT CONDITION AND SPECIFIED CONDITION

        Measurement Condition Switch Condition Specified Condition
        Battery positive (+) --> Terminal 12 (INDL) Battery negative (-) --> Terminal 8 (E) ON (LH) Illuminates

        If the result is not as specified, replace the switch or bulb.

      3. Check that the climate control switch illuminates.

      OK: 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) --> Terminal 7 (ILL+) Battery negative (-) --> Terminal 8 (E) Illuminates

      If the result is not as specified, replace the switch or bulb.

      Fig 7: Identifying Climate Control Switch LH Connector Terminals (Rear)
      G03001187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. INSPECT CLIMATE CONTROL SWITCH RH (REAR) 
      1. Measure the resistance between the terminals when the switch is operated.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        3 (VSR) - 6 (V5R) Switch ON (RH) Max. COOL to Max. WARM 0 --> to 5 kΩ
        4 (SWR) - 8 (E) ON Below 1 Ω
        4 (SWR) - 8 (E) OFF 10 kΩ or higher

        HINT:

        As the dial is being turned, the resistance changes gradually.

        If the result is not as specified, replace the switch.

      2. Check that the climate control switch indicator illuminates.

        OK: 

        MEASUREMENT CONDITION AND SPECIFIED CONDITION

        Measurement Condition Switch Condition Specified Condition
        Battery positive (+) --> Terminal 12 (INDR) Battery negative (-) --> Terminal 8 (E) ON (RH) Illuminates

        If the result is not as specified, replace the switch or bulb.

      3. Check that the climate control switch illuminates.

      OK: 

      MEASUREMENT CONDITION AND SPECIFIED CONDITION

      Measurement Condition Specified Condition
      Battery positive (+) --> Terminal 7 (ILL+) Battery negative (-) --> Terminal 8 (E) Illuminates

      If the result is not as specified, replace the switch or bulb.

      Fig 8: Identifying Climate Control Switch RH Connector Terminals (Rear)
      G03001188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. INSPECT SEAT CLIMATE CONTROL BLOWER LH (REAR SEAT CUSHION) 
      1. Connect the battery's positive (+) lead to terminals 3 (BCS) and 4 (BFC-), and the negative (-) lead to terminal 2 (BFC+). Check that the blower fan motor operates smoothly.

      If the result is not as specified, replace the blower.

      Fig 9: Inspecting Seat Climate Control Blower LH (Rear Seat Cushion)
      G03001189Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. INSPECT SEAT CLIMATE CONTROL BLOWER RH (REAR SEAT CUSHION) 
      1. Connect the battery's positive (+) lead to terminals 3 (BCS) and 4 (BFC-), and the negative (-) lead to terminal 4 (BFC-). Check that the blower fan motor operates smoothly.

      If the result is not as specified, replace the blower.

      Fig 10: Inspecting Seat Climate Control Blower RH (Rear Seat Cushion)
      G03001190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. INSPECT SEAT CLIMATE CONTROLLER LH (REAR SEAT CUSHION) 
      1. Measure the resistance between the terminals when the switch is operated.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        4 (TDB-) - 5 (TDB+) Always Below 1 Ω

        If the result is not as specified, replace the controller.

      2. Measure the thermistor resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      2 (TCS) - 3 (TC5) Controller temperature 10°C (50°F) 3.6 to 3.8 kΩ
      2 (TCS) - 3 (TC5) Controller temperature 25°C (77°F) 1.9 to 2.1 kΩ
      2 (TCS) - 3 (TC5) Controller temperature 30°C (86°F) 1.6 to 1.7 kΩ

      HINT:

      As the temperature increases, the resistance decreases.

      If the result is not as specified, replace the controller.

      Fig 11: Identifying Seat Climate Controller LH Connector Terminals (Rear Seat Cushion)
      G03001191Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. INSPECT SEAT CLIMATE CONTROLLER RH (REAR SEAT CUSHION) 
      1. Measure the resistance between the terminals when the switch is operated.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        4 (TDC-) - 5 (TDC+) Always Below 1 Ω

        If the result is not as specified, replace the controller.

      2. Measure the thermistor resistance between the terminals

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      2 (TCS) - 3 (TC5) Controller temperature 10°C (50°F) 3.6 to 3.8 kΩ
      2 (TCS) - 3 (TC5) Controller temperature 25°C (77°F) 1.9 to 2.1 kΩ
      2 (TCS) - 3 (TC5) Controller temperature 30°C (86°F) 1.6 to 1.7 kΩ

      HINT:

      As the temperature increases, the resistance decreases.

      If the result is not as specified, replace the controller.

      Fig 12: Identifying Seat Climate Controller RH Connector Terminals (Rear Seat Cushion)
      G03001192Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. INSPECT SEAT CLIMATE CONTROL BLOWER LH (REAR SEATBACK) 
      1. Connect the battery's positive (+) lead to terminals 3 (BBS) and 4 (BFB-), and the negative (-) lead to terminal 2 (BFB+). Check that the blower fan motor operates smoothly.

      If the result is not as specified, replace the blower.

      Fig 13: Inspecting Seat Climate Control Blower LH (Rear Seatback)
      G03001193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. INSPECT SEAT CLIMATE CONTROL BLOWER RH (REAR SEATBACK) 
      1. Connect the battery's positive (+) lead to terminals 3 (BBS) and 4 (BFB-), and the negative (-) lead to terminal 2 (BFB+). Check that the blower fan motor operates smoothly.

      If the result is not as specified, replace the blower.

      Fig 14: Inspecting Seat Climate Control Blower RH (Rear Seatback)
      G03001194Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. INSPECT SEAT CLIMATE CONTROLLER LH (REAR SEATBACK) 
      1. Measure the resistance between the terminals when the switch is operated.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        4 (TDB-) - 5 (TDB+) Always Below 1 Ω

        If the result is not as specified, replace the controller.

      2. Measure the thermistor resistance between the terminals

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      2 (TBS) - 3 (TB5) Controller temperature 10°C (50°F) 3.6 to 3.8 kΩ
      2 (TBS) - 3 (TB5) Controller temperature 25°C (77°F) 1.9 to 2.1 kΩ
      2 (TBS) - 3 (TB5) Controller temperature 30°C (86°F) 1.6 to 1.7 kΩ

      HINT:

      As the temperature increases, the resistance decreases.

      If the result is not as specified, replace the controller.

      Fig 15: Identifying Seat Climate Controller LH Connector Terminals (Rear Seatback)
      G03001195Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. INSPECT SEAT CLIMATE CONTROLLER RH (REAR SEATBACK) 
      1. Measure the resistance between the terminals when the switch is operated.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        4 (TDB-) - 5 (TDB+) Always Below 1 Ω

        If the result is not as specified, replace the controller.

        Fig 16: Identifying Seat Climate Controller RH Connector Terminals (Rear Seatback)
        G03001196Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Measure the thermistor resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      2 (TBS) - 3 (TB5) Controller temperature 10°C (50°F) 3.6 to 3.8 kΩ
      2 (TBS) - 3 (TB5) Controller temperature 25°C (77°F) 1.9 to 2.1 kΩ
      2 (TBS) - 3 (TB5) Controller temperature 30°C (86°F) 1.6 to 1.7 kΩ

      HINT:

      As the temperature increases, the resistance decreases.

      If the result is not as specified, replace the controller.

    13. INSPECT REAR SEAT CUSHION HEATER ASSY LH 
      1. Measure the resistance between the terminals of the rear wing outer heater LH.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        1 - 2 20°C (68°F) 2.8 to 3.4 Ω

        If the result is not as specified, replace the rear seat cushion heater assy LH.

        Fig 17: Identifying Rear Wing Inner Heater RH Terminals
        G03001197Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Measure the resistance between the terminals of the rear wing inner heater LH.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        1 - 2 20°C (68°F) 7.2 to 8.8 Ω

        If the result is not as specified, replace the rear seat cushion heater assy LH.

        Fig 18: Identifying Rear Wing Inner Heater LH Terminals
        G03001198Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Measure the resistance between the terminals of the rear cushion heater LH.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      A1 - B1 20°C (68°F) 4.2 to 5.1 Ω
      C2 - C4 20°C (68°F) 4.2 to 5.1 Ω
      A2 - B2 Always Below 1 Ω
      C1 - C3 25°C (77°F) 2 kΩ

      If the result is not as specified, replace the rear seat cushion heater assy LH.

      Fig 19: Identifying Rear Seat Cushion Heater LH Connector Terminals
      G03001199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    14. INSPECT REAR SEATBACK HEATER ASSY LH 
      1. Measure the resistance between the terminals of the rear seatback heater LH.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      A2 - A4 20°C (68°F) 5.4 to 6.6 Ω
      S60-4 - A2 20°C (68°F) 5.4 to 6.6 Ω
      S60-2 - A4 20°C (68°F) 5.4 to 6.6 Ω
      S60-1 - A1 Always Below 1 Ω
      S60-3 - A3 Always Below 1 Ω

      If the result is not as specified, replace the rear seatback heater assy LH.

      Fig 20: Identifying Rear Seatback Heater LH Connector Terminals
      G03001200Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    15. INSPECT REAR SEAT CUSHION HEATER ASSY RH 
      1. Measure the resistance between the terminals of the rear wing outer heater RH.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        1 - 2 20°C (68°F) 2.8 to 3.4 Ω

        If the result is not as specified, replace the rear seat cushion heater assy RH.

        Fig 21: Identifying Rear Wing Outer Heater RH Connector Terminals
        G03001201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Measure the resistance between the terminals of the rear wing inner heater RH.

        Standard: 

        TESTER CONNECTION AND SPECIFIED CONDITION

        Tester Connection Condition Specified Condition
        1 - 2 20°C (68°F) 7.2 to 8.8 Ω

        If the result is not as specified, replace the rear seat cushion heater assy RH.

        Fig 22: Identifying Rear Wing Outer Heater RH Connector Terminals
        G03001202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Check the resistance between the terminals of the rear cushion heater RH.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      A1 - B1 20°C (68°F) 4.2 to 5.1 Ω
      C2 - C4 20°C (68°F) 4.2 to 5.1 Ω
      A2 - B2 Always Below 1 Ω
      C1 - C3 25°C (77°F) 2 kΩ

      If the result is not as specified, replace the rear seat cushion heater assy RH.

      Fig 23: Identifying Rear Cushion Heater RH Connector Terminals
      G03001203Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    16. INSPECT REAR SEATBACK HEATER ASSY RH 
      1. Measure the resistance between the terminals of the rear seatback heater RH.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      A2 - A4 20°C (68°F) 5.4 to 6.6 Ω
      S61-4 - A2 20°C (68°F) 5.4 to 6.6 Ω
      S61-2 - A4 20°C (68°F) 5.4 to 6.6 Ω
      S61-1 - A1 Always Below 1 Ω
      S61-3 - A3 Always Below 1 Ω

      If the result is not as specified, replace the rear seatback heater assy RH.

      Fig 24: Identifying Rear Seatback Heater RH Connector Terminals
      G03001204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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